Robot vacuum



FIG. 1 is a front elevation view of a robot vacuum, showing the new design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a left elevation view thereof;

FIG. 4 is a right elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a front, top, left perspective view thereof;

FIG. 8 is a front, bottom, left perspective view thereof;

FIG. 9 is a rear, top, right perspective view thereof;

FIG. 10 is a bottom, right, rear perspective view thereof;

FIG. 11 is a front, top, right perspective view thereof;

FIG. 12 is a front, bottom, right perspective view thereof;

FIG. 13 is a rear, top, left perspective view thereof; and,

FIG. 14 is a rear, bottom, left perspective view thereof.

The broken lines in the figures show portions of the robot vacuum that form no part of the claimed design. 

CLAIM The ornamental design for a robot vacuum, as shown and described. 